Up Next
Back to Show
Evolution Earth
The Impact of the Broad-tailed Hummingbirds' Migration
billy barr looks through the logs he's been keeping for almost 50 years. He explains how the glacier lilies emergence is becoming more and more out of sync with the broad-tailed hummingbirds arrival after their long migration up from Mexico. When billy started keeping his records in the 70s they arrived on the same day, today the lily is flowering three weeks before the hummingbird arrives.
Support Provided By
Unlock with PBS Passport
55:05
Forgotten and overlooked, grasslands could hold the key to our planet’s survival.
Unlock with PBS Passport
55:25
At the planet’s frozen extremes, animals can reveal the changes taking place.
Unlock with PBS Passport
55:31
In the hottest places, species are going to extraordinary lengths to survive.
Unlock with PBS Passport
55:26
Remarkable island wildlife reveals insights into our rapidly changing planet.
Unlock with PBS Passport
55:26
Animals have a surprising story to tell about our rapidly changing planet.